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Connecting to other data sources
Use the settings in the following table
to connect ColdFusion to data sources through JDBC drivers that
do not appear in the drop-down list of drivers:
Setting
|
Description
|
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CF Data Source Name
|
The data source name (DSN) that ColdFusion
uses to connect to the data source.
|
JDBC URL
|
The JDBC connection URL for this data source.
|
Driver Class
|
The fully qualified class name of the driver.
For example, com.inet.tds.TdsDriver. The JAR file that contains
this class must be in a directory defined in the ColdFusion classpath.
|
Driver Name
|
(Optional) The name of the driver.
|
User name
|
The user name that ColdFusion passes to
the JDBC driver to connect to the data source if a ColdFusion application
does not supply a user name (for example, in a cfquery tag).
|
Password
|
The password that ColdFusion passes to the
JDBC driver to connect to the data source if a ColdFusion application
does not supply a password (for example, in a cfquery tag).
|
Description
|
(Optional) A description for this connection.
|
Connection String
|
A field that passes database-specific parameters,
such as login credentials, to the data source.
|
Limit Connections
|
Specifies whether ColdFusion limits the
number of database connections for the data source. If you enable
this option, use the Restrict Connections To field to specify the
maximum.
|
Restrict Connections To
|
Specifies the maximum number of database
connections for the data source. To use this restriction, enable
the Limit Connections option.
|
Maintain Connections
|
ColdFusion establishes a connection to a
data source for every operation that requires one. Enable this option
to improve performance by caching the data source connection.
|
Timeout (min)
|
The number of minutes that ColdFusion MX
maintains an unused connection before destroying it.
|
Interval (min)
|
The time (in minutes) that the server waits
between cycles to check for expired data source connections to close.
|
Disable Connections
|
If selected, suspends all client connections.
|
Login Timeout (sec)
|
The number of seconds before ColdFusion
times out the attempt to log in to the data source connection.
|
CLOB
|
Select to return the entire contents of
any CLOB/Text columns in the database for this data source. If not selected,
ColdFusion retrieves the number of characters specified in the Long
Text Buffer setting.
|
BLOB
|
Select to return the entire contents of
any BLOB/ Image columns in the database for this data source. If not
selected, ColdFusion retrieves the number of characters specified
in the BLOB Buffer setting.
|
LongText Buffer
|
The default buffer size; used if Enable
Long Text Retrieval (CLOB) is not selected. The default value is 64000 bytes.
|
BLOB Buffer
|
The default buffer size; used if the BLOB
option is not selected. The default value is 64000 bytes.
|
Allowed SQL
|
The SQL operations that can interact with
the current data source.
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For example, you can use the Other Data
Sources option to define a data source for DB2 OS/390 or iSeries,
using the following settings:
- JDBC URL
- jdbc:datadirect:db2://dbserver:portnumber
- Driver class
- .jdbc.Driver
- Driver name
- DB2
- User name
- A user defined to the database
- Password
- The password for the user name
- Connection string
- Specify one connection string for the first connection, and then
modify it for use in subsequent connections, as follows:
On the initial connection, specify LocationName, CollectionId,
CreateDefaultPackage, and sendStringParametersAsUnicode (with no
spaces) as the following example shows:
LocationName=SAMPLE;CollectionId=DEFAULT;CreateDefaultPackage=TRUE;sendStringParametersAsUnicode=false
Note: If the database uses Unicode, specify true for
the sendStringParametersAsUnicode parameter.
On subsequent connections, specify LocationName, CollectionId,
and sendStringParametersAsUnicode, as the following example shows:
LocationName=SAMPLE;CollectionId=DEFAULT;sendStringParametersAsUnicode=false
Note: DB2 OS/390 refers to all supported versions of
DB2 on OS/390 and z/OS platforms. DB2 iSeries refers to all supported
versions of DB2 on iSeries and AS/400.
For more information
on DB2, see Connecting to DB2 Universal Database.
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